filling values in a vector using smaller vector
Milton Huang wrote:
Dear list members: I am looking for an elegant (or efficient) way to accomplish the following: take a large boolean vector and fill the TRUE values with the values from a smaller boolean vector that has a length that is the number of TRUE values of the large vector. Example: large<- c(FALSE, FALSE, FALSE, TRUE, FALSE, FALSE, TRUE, FALSE, FALSE, FALSE, TRUE, FALSE) small<- c(TRUE, FALSE, TRUE) desired output = c(FALSE, FALSE, FALSE, *TRUE*, FALSE, FALSE, *FALSE*, FALSE, FALSE, FALSE, *TRUE*, FALSE)
large[which(large)] = small
# large[which(large)] = paste("*", small, "*", sep="") to see it's as
you specify
?which
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